Be sure to have your class Secret Identification Code (SID) and laboratory
section number entered.

This Pre-Laboratory assignment consists of two pages with questions to be
answered. After answering the questions (there are 5) on this page, click
the Submit button to transfer your responses to Dr. G. After clicking the
Submit button a page will be displayed summarizing your responses. I recommend
you print this page out and bring it with you to laboratory. At the bottom
of the first response page is a link to the second page of questions. On the
second page you must enter your SID and laboratory and answer the questions
on the second page as well as you can. Clicking the Submit button on the second
page will take you to the second response page. Again it is recommended you
print this page and bring it with you to laboratory.

Both of the pages must be completed before
coming to your laboratory during the week of February 18 - 22, 2002. This
Pre-laboratory assignment will count towards the 15 points for the laboratory.
The Pre-Lab is likely to be worth 3 points. Two of the three points will be
awarded for completing both pages of questions. One point will be award for
answering all of the questions as well as you can. YOur answers will not be
graded for correctness, just for completeness.

You are welcome to work in small groups, but I expect each student to answer
the questions themselves, and submit their own responses. Duplicate copies
of responses submitted as independent work will receive 0 points for the Pre-laboratory.

Important do not press the enter key or the Return key
while you are answering these questions. Your Browser will interpret either
key the same as clicking the mouse on the Submit button. So BE CAREFUL!

NOTE: If the video does not play you will need to download
the QuickTime Player Plug-in or the QuickTime Player for Windows Plug-in from
the Apple web site. If
you are using a modem connection from home that is not DSL or CableModem the
download times required to view the movies will be long. The movies range in
size from 2 Megs to 6 Megs. The movie on this page is about 6 Megs. The movies
on the following page are smaller.

SID#

Lecture Section:

View the movie on the right and answer Questions 1 - 5:

1. Identify the chemical species present in the solution poured into
the beaker on the left in the movie.

2. Identify the chemical species present in the solution poured into
the beaker on the right in the movie.

3. What evidence is there for a chemical reaction when the two solutions
are mixed?

4. Given the fact that soluble ionic compounds exist in solution in the
form of their component ions and insoluble compounds do not, which of the
following species mostly likely accounts for your observation(s) in Question
3 above. Please choose only ONE of the five products.

Product 1 : Fe(SCN)3(aq)

Product 2 : Fe(SCN)3(s)

Product 3 : KNO3(aq)

Product 4 : KNO3(s)

Product 5 : FeSCN2+(aq)

Briefly, explain how you arrived at your answer. Also explain, why
you eliminated the other choices.

5. Write the balanced net ionic equation that represents the chemical reaction
between Fe(NO3)3(aq) and KSCN(aq). Identify the color
of each of the species in the net ionic equation.